Experiments with captive eagles indicate that adults require about 3/4 pound (1/3 kg) of meat per day to maintain their weight; young, growing eagles require much more food.
Accounts of the weight that an eagle can carry in flight often have been misstated. Experiments indicate that, without wind to assist them, even large eagles cannot take off from flat ground with more than 5 or 6 pounds (2 to 3 kg) in their talons. Eagles flying into the wind and taking prey from hillsides, however, sometimes carry animals of twice those weights for considerable distances.
Resources: (online)
Eagles
